Leaf-turner.



D. MACDONALD.

LEAF TURNER. APPLICATION FILED FEB. 10, 1908.

Patented Apr. 13, 1909.

WZIzessex:

M 4 m 6? 3. M.

DAVID MACDONALD, OF LONDON, ENGLAND.

LE AF-TURNER.

Application filed February 10, 1908.

Specification of Letters Patent.

Patented April Serial No. 415,064.

tWO plates such as m and G of clip are connected to each otner by a pivoted joint (Z, the

; sheets ma readily be inserted.

the construction of apparatus for turning:

over the leaves of a book, more especially of a music book held on a piano raclr, and oi the type in which centrally operated turning arms having clips to grip the sheets are released intermittently from a catch holding them at one side of the rack.

The object of the invention is to simplify the construction oi the leaf clips and the release gear and to render the latter adjustable, so as to remedy certain defects which have been found to make such an apparatus diiiicult of operation in practice.

The accompanying drawings illustrate the invention.

Figure 1, is a -l'rontelevation 01" the leal turner. Fig. 2, is a plan of Fig. 1. Fig 3, is an enlarged view oi the release gear. 1 4, is a plan oi Fig. 3. Fig. 5, is an end view of Fig. 3, and Fig. 6, is a side elevation showing the operation of the sheetclips.

A series of arms B C D are pivoted on a central spindle E, each arm is provided at its outer end with a spring clip F H l in which the sheets to be turned are placed before using. Each arm is connected by means of cords such as J, K, with springs such as L, fixed to the back book rest 0 is provided with pegs l and and an elastic cord R is attached to the upright- S the book being inserted Within the 31 cord R and the covers kept in place by the lease gear, carried by the flexible bracket Vt.

So far the parts described are old. he improvements consist firstly 1n lor1ning the sheet clips as shown in Fig. 6 3 each clip is attached to the turning arms A, B, C, D respectively at the same level the arms being bent as shown in Fig. 1, to bring them into this position; one half 01' each clip has l l l 1 l I l l l l l l l l w 1 stated. board iv; the

top ends being pressed together by sprin the clips are so arranged that they ms 3e all pressed together at once shown in i ig. 6 so as to open the sheet ends and wh le in their compressed position they are held tei'nporarily by a hinged clip 7) so that the T he pivot l is termed by a pin extending across a bracket 11 with turned up sides which side form a bearing for the pivot pin; the bracket is attached to the music stand by screws r, '2.

The release gear consists oi the compound cam T, t, firmly attached to the spindle U the faces a, and 5 being cut away as shown in Figs. 3 and 4 so as to retain or release respectively the plates such as is attached to the sheet clip. The cam is operated by the leverX operating against the action of a coil spring a surrounding the spindle U and secured at one end to the cam 72 and at the other end to the loose dislr o. lhe amount o'l rotary movement that can be imparted to the cam l) is limited by cutting out a segment to in which operates the step .i'. The position oi' this cut out segment is oi coniderable importance, one side thereof being formed in such a position as to limit the stroke of the operating lever, by hitting the stop a: on. the bracket Vi when the lever is depressed. ln machines with an unlimited stroke it has often been the case that two leaves would be turned at one tim which is prevented in this machine by the means The amount of tension on the spring a is adjusted by twisting the disl; n, the said disl: being secured in place by the screw 1 threaded in one arm oi' the rigid bracket Y, While passing t'reely through a hole in the v flexible bracket V. pegs P and The levers A B C D having l the leaves insert d in the spring clips G ll 1 are turned about the pivot E and brought into operative position by pressing them i past the projecting-edge of the cam Tot the re- The release cam 'l, l), is attached to its si'ipporting spindle by a screw, or other suit able connection which can be slackened: by this means a further advantage is attained that the position of the operatinglever X can readily be altered to any position desired.

it must be understood tha though rel'erred to herein as operated by springs, both the oscillation of the turning arms and the release gear may be actuated by elastic rubber devices if desired. In the other arm of the rigid bracket Y a screw 2 is threaded so that it can rotate freely at the flexible bracket end to which it is connected by a washer on the inside of the flexible bracket so that when rotated the screw draws tne flexible bracket W to or from the rigid bracket; as the spindle U is supported in the lugs V V of the flexible bracket, the cam T, b, is also drawn to or from the plate I by which it operates the turning arms and thus the amount of overlap is adjusted. 7

Pressure on the cup Z of the le er whether by a puff of breath from the player, or by a touch of the finger, will turn the spindle U and consequently the cam T and will thereby remove the projecting portions of the cam away from the path of one of the arms such as B, which will thereupon turn over to the left carrying its leaf with it. By another puff, or touch, each of the other arms is also caused to turn over taking the sheet with it, until all the sheets are turned. Though shown with four arms it is clear that any larger number of arms desired may be arranged for. It will be seen that hen one of the projecting edges of the cam T is removed from one arm the other projecting edge 7) will temporarily-catch the succeeding arm and hold it until a is again in place for so doing.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a leaf turner, and in combination, a framework to carry a book, spring operated pivoted arms carrying sheet clips, a release cam. mounted on a spindle, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, and a screw in same connecting it with the flexible bracket, substantially as and for the purpose set forth.

2. In a leaf turner, and in combination, a framework to carry a book, spring operated pivoted arms carrying sheet clips, a release cam mounted on a spindle having a segment cut out, a stop piece on the flexible bracket operating in the said segment, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, rigid bracket adjoining the flexible bracket, and a screw in same connecting it with the flexible bracket, substantially as described herein.

3. In a leaf turner, and in combination, a framework to carry a book, spring operated pivoted arms carrying sheet clips, a release cam mounted on a spindle, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, a screw in same connecting it with the flexible bracket in order to adjust the latter, a loose collar 011 the cam spindle carrying the stationary end of the coil spring and provided with holes in its periphery, and a screw carried by the rigid bracket for adjusting same, substantially as described herein.

t. In a leaf turner, and in combination, a framework to carry a book, spring operated pivoted arms carrying sheet clips, a release cam mounted on a spindle having a segment cut out, a stop piece on the flexible bracket operating in the said segment, a coil spring attached at one end to the cam and at the other end to a stationary part, flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, a screw in same connecting it with the flexible bracket in order to adjust the latter, a loose collar on the cam spindle carrying the stationar end of the coil spring and provided with holes in its periphery, and a screw carried by the rigid bracket for adjusting same, substantially as described herein.

In a leaf turner, and in combination, a framework to carry a book, spring operated pivoted arms carrying sheet clips, an independent bearing bracket for the spring operated pivoted arms, a release cam mounted on a spindle having a segment cut out, a stop piece on the flexible bracket operating in the said segment, a coil sping attached at one end to the cam and at the other end to stationary part, a flexible bracket carrying the cam spindle a rigid bracket adjoining the flexible bracket, a screw in same connecting it with the flexible bracket, a loose collar on the cam spindle carrying the stationary end of the coil spring and provided with holes in its periphery, and a screw carried by the rigid bracket for adjusting same, substantially as and for the purpose set forth.

6. In a leaf turner, and in combination, a framework to carry a book, spring operated turning arms having sheet clips with extended bottom portions, distance pieces therebetween, springs between the two arms of the clip, a catch for securing all the clips together with their sheet ends open, a release cam mounted on a spindle, coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, and a screw in same con necting it with the flexible bracket, substan tially as described herein.

7. In a leaf turner, and in combination, a framework to carry book, spring operated turning arms having sheet clips with extended bottom portions, distance pieces there between, springs between the two arms of the clip, a cat-ch for securing all the clips together with their sheet ends open, a release cam mounted on a spindle having a segment cut out, a stop piece on the flexible bracket operatin in the said segment, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, and a screw in sarne connecting it with the flexible bracket, 1 substantially as described herein.

8. In a leaf turner, and in combination, a framework to carry a book, spring operated turning arms having sheet clips with extended bottom portions, distance pieces therebetween, springs between the two arms oi the clip, a catch for securing all the clips to gether with their sheet ends open, a release cam mounted on a spindle having a segment cut out, a stop piece on the flexible bracket operating in the said segment, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, a screw in same connecting it with the flexible bracket in order to adjust the latter, a loose collar on the cam spindle carrying the stationary end of the coil spring and provided with holes in its periphery, and a screw carried by the rigid bracket for adjusting same, substantially as described herein.

9. In a leaf turner, and in combination, a framework to carry a book, spring operated turning arms having sheet clips with extendcd bottom portions, distance pieces there- .oetween, springs between thetwo arms or the clip, a catch for securing all the clips together with their sheet ends open, an independent bearing bracket for the spring operated pivoted arms, a release cam mounted on a spindle havinga segment cut out, a

stop piece on the flexible bracket operating in the said segment, a coil spring attached at one end to the cam and at the other end to a stationary part, a flexible bracket carrying the cam spindle, a rigid bracket adjoining the flexible bracket, a screw in same connecting it with the flexible bracket in order to adjust the latter, a loose collar on the cam spindle carrying the stationary end of the coil spring and provided with holes in its periphery, and a screw carried by the rigid bracket for adjusting same, substantially as described herein.

in testimony whereof, I have affixed my signature, in presence of two witnesses.

DAV 1D MACDONALD. "Witnesses H. D. JAMESON, R. WrLLIAMs. 

